Ignatov A. Substitution of rare-earth elements for strontium in the structure of apatite

The object is the isomorphous substitution of atoms in the crystal structure; the aim is synthesize of single phase solid solutions of strontium hydroxyapatite modified by rare-earth elements; the methods are XRD (DRON-2, Rietveld refinement), IR spectroscopy (Perkin-Elmer), diffusion reflectance ((PERKIN-ELMER Lambda 9 UV/VIS/NIR Spectrophotometer) and chemical analysis; the new approach lies in investigation of isomorphous substitution of rare-earth elements for strontium in the structure of apatite; the main results include the determination of the factors, which exert influence on width of single phase range, and the ones, which have the influence on interatomic distances changes, were determined; the results of investigation may be used as information for expert in various branches of science and engineering; the field is inorganic chemistry, crystal chemistry, material science.